I'm a big fan of tower defense games, and being able to take them with me on my BlackBerry is a huge plus. The latest comes from Gameloft Inc and is called Mega Tower Assault. The game provides you with 8 different types of towers with which to defend youself. There are 12 maps in 4 settings including beach, snow, platform and lava. The graphics are great and the game is sure to provide hours of entertainment. If you've never tried tower defense before, this is definitely a great way to get started. You'll surely become addicted and won't want to put this one down. Mega Tower Assault is available in BlackBerry App World for just $0.99.